Steam or other pipe.



No. 672,034'. Patented Apr. I6, |90l.

T. CUNNINGHAM.

STEAM 0H OTHER PIPE.

(Application led Dec. 26, 1899.)

(No Model.)

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UNITED STATES PATENT OFFICE.

THOMAS CUNNINGHAM, OF'WENHAM, MASSACHUSETTS.

STEAIVI OR OTHER PIPE.

SPECIFICATION formingpart of Letters Patent N o. 672,034, dated April 16, 1901.

Application filed December 26, 1899. Serial No. 741,547. (No model.)

To' all whom it may concern:

Be it known that I, THOMAS CUNNINGHAM, a citizen of the United States, residing at Wenham, in the county of Essex and State of Massachusetts, have invented a new and useful Improvement in Steam or other Pipes, of which the following is a full, clear, and eX- act description, reference being had to the accompanying drawings, forming a part of this specification, in explaining its nature.

The invention relates to steam or other pipe comprising a tube of relatively thin hornogeneous metal which is provided with independent metal coupling-llanges at each end, secured thereto as hereinafter specified;

In the drawings, Figure l is a view in elevation of the end of a pipe. Fig. 2 is a view in elevation of a conpling-fiange to be united thereto. Fig. 3 is a view in section of the pipe and the ange, representing the flange as placed upon the end of the pipe. Fig. 4 is a view of the same parts, representing the pipe as provided with a flange retaining shoulder and a projecting bead-forming end.

Fig. 5 is a view in section of the completed l pipe and liange. Fig. 6 is a view in section to illustrate the manner of connecting or joining the pipes. Fig. 7 is a view illustrating a modification,reference to whichl is hereinafter made.

In the drawings, A represents a pipe of homogeneous metal, preferably wrought iron or steel. At each end there is secured to it a metallic coupling-liange B. This iiange has the circular outer edge b and a hole b of a size to snugly fit the pipe A. It is placed upon the end of. the pipe as represented so that a short section ct of the pipe extends beyond its outer surface b2. The tube is then expanded beyond the inner surface b3 of the ange to provide the enlargement a upon said side of the liange and which furnishes a shoulder, against which it is set, and the end a, of the pipe is then peened or beaded over upon the outer surface Vof the Iiange, forming a continuous rib or bead a2 thereon around the hole b. Each end of the pipe is thus supplied with a coupling-flange, and the pipe-sections thus made are coupled together by providing the flanges with holes C for the reception of coupling-bolts C,which pass through the holes and by means of nuts bolt the ianges together. To make a tight joint, a gasket D, of compressible packing, is inserted between the bead or rib a2 and the bolt-holes and is compressed between the lianges by the bolts.

In Fig. 7 I have shown the coupling-flange as secured to the pipe by expanding the end of the pipe against the inner edge of the coupling-'flange about its hole b and by turning outward the end of the pipe to form a bead upon the outer surface of the flange like that above described. There is thus substituted for the shoulder a the setting of the pipe against the iiange by the expansion of the pipe.

The invention is applicable to the manufacture of pipes for conducting steam, water, oil, and other purposes. Only such steel or iron or other metal may be used in the man ufact'ure of the pipes as may be capable of being manipulated in the manner speciied.

The invention is especially adapted for use in connection with wrought-iron pipe of the character of boiler-tubing, and old boiler-tubing which is now a refuse product may be converted into marketable pipe of the first quality in this manner.

The advantages of the invention arise from the fact that a convenient means is provided for'strongly uniting coupling-flanges to pipesections and in a manner not to weaken the pipe 'or the ianges, thereby enabling much 'thinner and wrought-iron pipe to be used for steam and other purposes than is now possible.

Having thus fully described my invention, I claim and desire to secure by Letters Patent of the United Statesl. The improved steam and other pipe herein described, the same comprising a pipelink, A, of uniform thickness throughout, and an independent coupling-flange, B, having a smooth interior adapted to slide over the end o f said pipe length, and being provided with suitable bolt-holes, said pipe having an enlargement made independently of the iiange and adapted to furnish a rear support for said flange, and the end of said pipe being spread outwardly whereby the said flange is held between said enlargement and said outwardlyturned end, as and for the purposes described.

2. The combination of two pipe-sections,

IOO

A, A', each provided With an enlargement coupling-bolts passing through said ianges, r6 near its end, as described, and having a iiange and a gasket or packing interposed between composed of a flat disk having an opening to said flanges and compressed by said coupling-V pass over said pipe, said enlargement being bolts, as set forth.

made independent of said iiange and said I y {iange abutting against said enlargement, the THOMAS CUNNINGHAM' end of each section being turned upward and Witnesses:

outward against said iange, whereby said i F. F. RAYMOND, 2d,

flange is firmly secured to said.y pipe-section, l J. M. DOLAN. 

